Marcus has 2 sisters.The sum of the girls' ages is 13.The product of their ages is 36.How old is each sister?

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Marcus has 2 sisters.The sum of the girls' ages is 13.The product of their ages is 36.How old is each sister?

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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Let the age of the sisters as a and b. then, a+b=13 and a*b=36 this implies a=13-b. hence (13-b)(b)=36. solve it then u get the answer
Say one sister is Z and another sister is Y. You'd have to make a simultaneous equation, so it would be: Z+Y=13 ZY=36 You could solve it multiple ways, but the way I think is easiest would be substitution. Basically, if you used substitution, you would get Y=13-Z (because you solved for Y). Then you'd take that answer (13-Z) and substitute it for Y in the second equation. You'd then get: Z times (13-Z) = 36. So then you would just solve.
still no clue ....

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Z*(13-Z)=13Z-Z^2. 13Z-Z^2=36. Then you can factor I think. So: -Z^2+13Z-36=0 But we don't want a negative Z^2, so we have to flip all of the signs. Now we get: Z^2-13Z+36=0. Then factor. Because 13Z is negative and 36 is positive, you're going to have two negative answers in your factors. What two numbers multiply to 36 and add up to -13? -9 and -4. So Z can either equal 9 or 4, because you have to flip the signs. (And that should be apparent because you can't be a negative age.) So the sisters are aged 9 and 4. I hope that makes sense.. I haven't done that kind of equation in forever, but I think it's right.
thy...me too this is for my daughter she is in 4 g and I'm out of school for over 30 years..lol
yes.sarahlynn is right. the answer should be 4 and 9 years old.
thank you this is the Destiny so one is 9 and the other one is 4 because 9*4=36 and 4*9=36 right so this would be right!!!

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